Frictional screw-spindle press



Nov. 25, 1930. o; GEORG 1,783,115

FRIGTIONAL SCREW SPINDLE PRESS I Filed July 12, 1927 2 Shets-Sheet 1 Fig. 2.

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3\ INVENTORI BY 0260 6 (9) r7 ATTORNEY Nov. 25, 1930.

O; GEORG FRICTIONAL SCREW SPINDLE PRESS Filed July 12, 1927 2 Sheets-Sheet .2

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Patented Nov. 25, 1930 PATENT OFFICE Q estio s? HERDECKE, GERMANY a 1 "A ication filed July i2;v leavys riai no. 205,268; imam Germany February as, 19 27;"'

This invention has reference to frictionoperated spindle presses in which the spindle is provided witha fly wheelwhich, by the alternatingly occurring pressure of side disks,

5 is rotated alternatingly towards the left and towards the right, and it refers in particular to means in connection with machines of the kind referred'toand adapted to force the side disks'againstthe intermediate fly wheel, andin connection therewith it is an important object of this invention to facilitate the operation of such machines,sto increase'the eificien y and to achieve great economy in WOIkmg mater al. a i i In friction-operated screwtspindle-presses,

I as heretofore constructed the side disks have beentforced against the intermediate disk by manually operated means and by the operation of a corresponding system of steering and controllinglevers. This manner of operation however is open tovarious inconveniences and difiiculties. In the case of ina- "chines of medium sizeandlarge-sized Inachines which require: a considerable engaging force for the pressure of the side disks the operator is unabletofurnish the required pressure. He generally does notpress hard enough and as a result thereof there is a continuousrelative sliding movement between the side disk and theintermediate disk with the consequent destructionof large amounts of energies in the formof; relativegrinding movementsof the parts. 'VVith verylarge machinesthere is also the liability that the operator is unable in the lower dead-centre ipOsltlOll to furnish the engaging pressure Y i 1 which is required for the raising of the heavy i intermediate disk and of the spindle or shaft connected thereto and of the rain; The side disk is continuouslynsliding along theintermediate diskand in viewof the-high peripheral velocityjof the side {disk very large amountsof energy are annihilated andthe binding tires of the intermediate disk are heated and ground and are destroyed by fricti on. e i

In order to avoidthese losses and difliculties and to save the tires the operation of forcing the side disks into engagement, 1n-

50 stead of being performed by hand as has other mechanical means.

leather or thelike.

according to this invention by specialauxiliary means, and as a result thereof the operation of the machines ofthe kind: referred to, even of very large size isfaoilitated and 5. the efficiency is very highly increasedand the life of the tires is prolonged. As such auxiliary means all those agents maybe employed whiclninthe case of other machinery, a are likewise utilized for ithedriving of so called servoanotors, such as for instance oil, air,qwater, steam, springs, electromagnets or The invention will be more particularly described by reference to the accompanying drawing showing several embodiments of the principles of the invention by way ofexemplification. Fig; 1 shows a screw-spindle presswith an auxiliary or servo-motor in front elevation and part section. Fig. 2

represents a screw-spindle'press with a servomotor adapted to be operated by air, steam, oilor water and shown'in front elevation and partial section. Fig. 3 is adiagram illustratinganelectric auxiliary or servo-motor which may be employed :in connection with thecpress shown. a i

The frictionally operated press according to Fig. 1 comprises the body part 1 the upper portion of which carries the bridge part 2 which is secured in position by bolts or rods 3. The transversally disposed bridge portion 2- supports a nutA which is engage-dby the screw spindle 5. To the lower parts of the spindle the ram 6 is secured adapted to slide in the body part 1 of the'machine, while at the top end of the screwspind-lefi theintermediate disk 7 is secured, the periphery of whichis provided with a band or tire 8 of disk 7. The disk 36 isact uatedlby a pair of gear wheels 38, 39 andby means of the small i The intermediate disk 7 which levers the auxiliary or servo-motor is connected. This motor comprises two operating disks 19, adapted to be turned in opposite directions. They are driven respectively by open and crossed belts from the two driving pulleys 21, 22 upon the main shaft 11. The driving disks 19, 20 are provided at their inner portions with a conical section adapted to be engaged by corre sponding conical sections of the. sliding collar 23. This sliding collar is adapted to slide bymeans of the keys or splines 2 l along the nut 25 which atits inside is provided with screw threads of very steep pitch. The nut 25 is engaged with the threaded stem 26 of the steering rod 27. On both sides of the threaded portion the rod 27 issecured against rotation by corresponding square or four-cornered guides 28, 29 so that it is only free to move in the axial direction. The steering rod 27 is connected by the stud 30 to the steering levers 1? above referred to. The actuation of the servo-motor is effected by hand through the medium of the lever 31 which will couple the sliding collar 23 either with the left-hand or the right-hand driving disk. As a result thereof the nut 25 is rotated and it sli'dingly displaces the steering rod 27 to such an extent, and until a certain engagement pressure of one or the other side disks has been obtained. Then the conical coupling begins to slide. In accordance with the righthand or the left-hand driving disk being in too coupling position the steering rod 27 is either withdrawn or advanced, and as result thereof either the disk 36 or the disk 37 is forced into engaging position and the intermediate disk 7 is turned accordingly towards the right or towards the left,-which corresponds respectively to the rising or lowering of the carriage 6. The operation of the lever 31 is ellected by means of the link connection 34; and by the hand lever disposed within reach of the operator. Vfith this arrangement the operator is enabled to produce even the highest pressures.

Fig. 2 shows another exemplification of the principles of the invention. The machine as a whole is the same as the machine described with reference to Fig. 1 with the difference that the auxiliary or servo-motor in this exemplilication comprises a cylinder ll in which a piston or plunger 42 is slidingly fitted. The cylinder maybe charged with the driving agent, that isto say with oil, steam, wa-

ter, air or the like by means of the charging openings 4:3, 4 1 respectively disposed in front or at the rear of the piston -12. By the oper ation of the steering piston l5 sliding in the steering cylinder l6 the driving agent may be introduced at discretion in front or at the rear of the piston 42, so that this piston is moved either to the left or to the right with the corresponding forcing into engagement of the side disks. The intermediate disk 7 with the screw spindle is thereby moved up and down. The operation of the steering piston is effected by hand by means of the hand lever 35, as in the previous exemplification.

Fig. 3 is a diagram of an auxiliary or servomotor adapted for operation by the electric current. An iron core 62 is adapted to be drawn towards the left or right by the two electromagnets 63 and 64. The core 62 transmits its movement by means of the stud 30 to one or both of the two levers 17. The switclr ing on of the current for the windings of the two eleetromagnets 62, 6 L iselfected from the position of the operator by means of the switch 65. The application of this tyne of servo-motor will be apparent from the foregoing description.

1. A friction screw press comprising a frame, a. ram mounted on the frame, a screw spindle mounted on the frame and connected to the ram, an intermediate horizontal friction disk carried by the spindle, parallelhorizontal driving and driven shafts mounted on the frame at different levels respectively above and below the plane of the intermediate friction disk, drive gearing between the shafts, vertical friction disks respectively carried by said driving and driven shafts at opposite sides ofthe intermediate friction disks and alternately engageable with and disengageable from said intermediate disk by sliding motion of the driving and driven shafts in opposite directions, a pair of levers jointed at their relatively outer ends to said driving and driven shafts, a servo-motor jointed to the relatively inner ends of the levers for actuating the same in opposite directions to-impart sliding motion in one direction or the other to the shafts, and means for driving said servo-motor to move the levers in one direction or the other for so sliding the shafts.

2. A friction screw press comprising a frame, a ram actuating screw spindle mounted 011 the frame, a horizontal friction disk carried by said spindle, a pair of vertically disposed friction disks at opposite sides of the horizontal friction disk for driving the same in opposite directions, parallel horizontally arranged rotating and sliding shafts in gear with each other and carrying the vertical friction disks and arranged respectively above and below the horizontal plane of the 1,783,115 A i 7 I 3.

horizontal friction disk, and manually conmeans for driving said servo-motor, and mantrolled motor-operated means for simultaually operable means for governingthe action neously adjusting said horizontal shafts in of the servo-motor. one direction or the other and whereby the I testimony whereof-I affix my signature.

spindle may be governed to arrest the up and down travel of the horizontal friction disk in any Working position in its range of up and down travel. f z

3. A friction screw press comprising a frame, a ram actuating screw spindle mounted 011 the frame, a horizontal friction disk carried by saidv spindle, a pair of vertically disposed friction disks at opposite'sides of the horizontal friction disks for driving the same in opposite directions, parallel horizontally arranged rotating and sliding shafts in gear with each other and carrying the vertical friction disks and arranged respectively above and below the horizontal plane of the horizontal friction disk, and servo-motor actuated means for simultaneously sliding said horizontal shafts in one direction or the other for throwing one of the vertically disposed disks into action and'the" other outof action, and vice versa. V

4:. A friction screw press comprising a frame, a ram actuating screw spindle mountt ed on the frame, a horizontal friction disk carried by said spindle, apair of vertically disposed friction disks at opposite sides of the horizontal friction disk for driving the same in opposite directions, parallel horizontally arranged rotating and sliding shafts carrying the vertical friction disks and arranged respectively above andbelow the horizontal plane of the horizontal friction disk, levers pivotally connected to said horizontal shafts, gearing between the shafts, a servomotor for actuating the levers for simultaneously sllding the shafts 1n one direction or the other, and manually controlled means governing the servo-motor.

5. A friction screw press comprising a frame, a ram mounted on the frame, a screw spindle mounted on the frame and connected to the ram, an intermediate horizontal friction disk carried by the spindle, parallel horizontal driving and driven shafts mounted. on the frame at difier'ent levels respectively above and below the plane of the intermediatcfriction disk, drive gearing between the eluding a shaft jointed to the relatively inner ends of the levers for moving the same in opshafts, vertical friction disks respectively carried by said driving and driven shafts at opposite sides of the intermediate friction disk and alternately engageable with and disengageable from said intermediate disk by sliding motion of the driving and driven shafts in opposite directions, apair of levers jointed at their relatively outer ends to said driving and driven shafts, a servo-motor inposite directions to impart sliding motion in one direction or the other to the shafts,

orro GEORG. 

